1251343222105 has 8 divisors (see below), whose sum is σ = 1509157656000. Its totient is φ = 996044051376.

The previous prime is 1251343222021. The next prime is 1251343222109. The reversal of 1251343222105 is 5012223431521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251343222105 - 2⁷ = 1251343221977 is a prime.

It is a super-3 number, since 3×1251343222105³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1251343222109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628814695 + ... + 628816684.

It is an arithmetic number, because the mean of its divisors is an integer number (188644707000).

Almost surely, 2^{1251343222105} is an apocalyptic number.

It is an amenable number.

1251343222105 is a deficient number, since it is larger than the sum of its proper divisors (257814433895).

1251343222105 is a wasteful number, since it uses less digits than its factorization.

1251343222105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257631583.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1251343222105 its reverse (5012223431521), we get a palindrome (6263566653626).

The spelling of 1251343222105 in words is "one trillion, two hundred fifty-one billion, three hundred forty-three million, two hundred twenty-two thousand, one hundred five".